摘要
老空水害事故是威胁矿井安全的最大水害类型之一。针对沿采空区巷道掘进期间存在的水害威胁问题,采用现场经验总结、对比分析和几何计算的方法,从老空水疏放钻孔设计、定向穿透采空区和扩孔方法,以及采空区水量估算等方面进行研究,得出了定向长钻孔疏放老空水技术。试验表明:U型Φ133 mm钻孔设计可直接跨越多个工作面疏放水,且不易堵塞;定向钻具加密测量和普通稳斜螺旋钻具相配合,能够实现钻孔一次性安全钻透采空区;采用不带水辫扩孔的方式,可以提高扩孔效率76%;采空区水量估算方法,能够基本掌握老空水动态。现场试验实现了钻孔828 m一次性穿透采空区,靶点误差±1.7 m,钻孔出水量连续40多天,稳定在100 m3/h以上,保障了沿采空区巷道的安全掘进。
Goaf water accidents are one of the biggest types of water hazards that threaten mine safety.In response to the threat of water hazards during the excavation of goaf tunnels,a method of on-site experience summary,comparative analysis,and geometric calculation was adopted,and research has been conducted on the design of goaf water drainage boreholes,directional penetration of goaf and boreholes expansion methods,as well as estimation of goaf water volume.The directional long boreholes drainage technology for goaf water was developed.The experiment shows that the U-shapedΦ133 mm drilling design can directly cross multiple working faces for drainage and is not easily blocked.The combination of directional drilling tools for densifying measurement and ordinary inclined auger drilling tools can achieve safe drilling through goaf one time.By using the method of expanding holes without water swivel,the efficiency of expanding holes can be improved by 76%.The method for estimating goaf water volume can provide a basic understanding of the dynamics.The on-site experiment achieved a one-time penetration of 828m through the goaf with a target error of±1.7m.The water output of the borehole remained stable at over 100 m3/h for more than 40 days,ensuring safe excavation along the goaf roadway.
作者
董海潮
金鑫
DONG Haichao;JIN Xin(CCTEG Xi’an Research Institute(Group)Co.,Ltd.,Xi’an,Shaanxi 710077)
出处
《中国煤炭地质》
2024年第12期23-27,共5页
Coal Geology of China
基金
山西省科技重大专项“煤矿区煤与煤层气共采理论与关键技术体系及示范工程”(20201102001)子课题“不同采掘扰动区煤层气赋存条件与渗流机理”。
关键词
矿井安全生产
老空水疏放
长距离透巷
不带水辫扩孔
采空区水量估算
色连二矿
mine safety production
goaf water drainage
long-distance connecting roadway
expanding holes without water swivel
estimation of goaf water volume
Selian second mine
作者简介
第一作者:董海潮(1992—),男,硕士,工程师,现从事煤矿井下定向钻进技术的推广与应用。E-mail:497507968@qq.com。
